Oki OKIOFFICE84 Maintenance Manual page 465

9: Clock NG
Clock display is NG
No
Time error
Battery voltage at 2.5V
or higher
Yes
X2 oscillation frequency
is normal (32.768 kHz)
Yes
Input waveform of pin 2 of
IC4 is similar to Figures 9-1, 2
Yes
Input waveform of pin 2 of
IC3 is similar to Figures 9-1, 2
Yes
Input waveforms of pins 8
and 10 of IC3 are similar to
Figures 9-1, 2
Yes
Replace IC3.
40672201TH Rev. 4
Yes
All other operation display
are OK
No
See the operation
interface error.
No
Replace the battery.
No
Replace X2.
No
No
Replace IC4.
No
IC3 : Pin 2 (CS)
: Pin 8 (RD)
: Pin 10 (WR)
H - 10
Yes
No
(memory error does not
displayed on operation panel)
See the memory error.
Replace IC2.
Memory check is OK
Yes